{
  "manageEntity": {
    "action": "Save",
    "entityId": "50885",
    "entityType": "Track",
    "nonce": "0x673a4bb2ec36b51f0ad3dbd03644339f8da7b129660de197390c063b5b8113df",
    "signature": "0xff5d13b6827274b76aac7a68cfa2514bc92fd2de54a09656a78943445629c194423f42334491cf453f7f2e6571c74460921e06efea4005ebde376d0fb34d34fd1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}